Pumping pals - can't express milk

This might be a stupid question but how do you massage/express milk using pumping pals. I used to have Medela flanges and I would pump and express milk simultaneously, that way I would get a liitle bit more milk. I am a low producer, so every drop of milk counts : ) I see that a lot of people here use Pumping pals so I purchased them in hopes that they would alleviate my nipple pain but now I can't express milk and pump because every move breaks suction.